World No 1 Novak Djokovic has apologised to the startled ball boy caught in the crossfire of a tirade at his support team during his win over Andy Murray in Sunday's Miami Open final. 
Djokovic lost his cool at the end of the second set as Murray came back to take the match to a decider but has since expressed his regret at the incident in a video posted on Facebook. 
He said: 'It's probably been the best start to a season aside from 2011 that I had in my career, and I can't be more grateful for all the support I'm getting from you guys and I'm enjoying my time playing and competing and hopefully I brought a smile to your faces.
'Also I want to reflect on a bad moment that happened in the final against Andy when I lost the second set. I yelled to my camp and my box in frustration.
'I saw the replay. Unfortunately a ball boy was in the middle of it and I really, really feel sorry and regret that he was there. There was absolutely no intention whatsoever to hurt him or scare him in any kind of way. I sincerely hope he forgives me. I really apologise.'